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NTSB Report
September 22, 2020 · Md Helicopter 369 HS · N509CG
Chemehuevi Valley, CA
Overview
Report Status
Probable Cause
Event Type
Accident
Date
September 22, 2020
Injury Outcomes
No injuries (2 uninjured)
Location
Chemehuevi Valley, CA
Aircraft
Md Helicopter 369 HS (1974)
Tail Number
N509CG
Injuries
None
Aircraft Damage
Substantial
NTSB Number
WPR20LA323
The pilot reported that, he was decelerating the helicopter while on approach to the runway with a gusting variable wind when the helicopter unexpectedly yawed to the right. He applied full left anti-torque pedal input to no avail, so he applied forward cyclic to increase forward airspeed, but the helicopter continued to spin clockwise. He immediately reduced power to land, but the left skid struck a bush and the helicopter impacted terrain and rolled over, coming to rest on its left side. The fuselage and the tail boom were substantially damaged. The pilot reported that there were no preaccident mechanical malfunctions or failures with the helicopter that would have precluded normal operation.
NTSB Probable Cause
The pilot’s failure to maintain helicopter control during an approach with a gusting variable wind, which resulted in an impact with terrain.
Full Narrative
The pilot reported that, he was decelerating the helicopter while on approach to the runway with a gusting variable wind when the helicopter unexpectedly yawed to the right. He applied full left anti-torque pedal input to no avail, so he applied forward cyclic to increase forward airspeed, but the helicopter continued to spin clockwise. He immediately reduced power to land, but the left skid struck a bush and the helicopter impacted terrain and rolled over, coming to rest on its left side. The fuselage and the tail boom were substantially damaged. The pilot reported that there were no preaccident mechanical malfunctions or failures with the helicopter that would have precluded normal operation.
Flight
Event TypeAccident
Event Time13:24 PDT
Nearest AirportChemehuevi Valley (1nm NNW)
Runway16
Runway Length5000 ft
Runway Width75 ft
Flight Plan ActivatedNo
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftMd Helicopter 369 HS
Tail NumberN509CG
Aircraft CategoryHeli
DamageSubstantial
Operating RulePart 91
Engines1
Engine TypeTurboshaft
Engine DetailsRolls-Royce · 250-C18 · Turboshaft
Seats5
People & Injuries
Injury SummaryNo injuries (2 uninjured)
Fatal0
Serious0
Minor0
Uninjured2
Total2
Crew 1Age 53 · Second Class · None
Crew 2None
Conditions
ConditionsVMC
LightDaylight
WindGusting 18 kt
Visibility10 sm
CeilingNone
Temperature / Dew Point44 C
Altimeter29.89 inHg
Observation Time13:24
Weather SourcePILO